Nilo means counterclockwise, I think.
The idea is to counteract the play in the gear train.
Gears always have play between one turning direction and the other.
If there is no play they will bind and not work at all.
This play is often the cause of the behaviour you are describing.
Each movement type has a setting direction in which this play is less.
For the 7750 it is counterclockwise.
Have fun!
Don